It's not so much what you say, but also how you say it. Telling his brothers about his dream, Joseph says "Behold, we were binding sheaves in the field, and, behold, my sheaf arose and actually stood up, and, behold, your sheaves drew round and bowed to my sheaf." "Behold" connotes vanity and smugness, yet in this verse, Joseph used it three times. Nobody wants to receive a difficult message, especially from a superior; how such messages are delivered makes a difference to all parties.